that great scene, don draper singing "nobody never knows." there's a great cultural divide. you say it started in '63. why? >> it started in '63 because tv and radio woke up to this huge youth movement in britain. >> yes. >> before '63, kids liked the beatles, kids like the stones couldn't play on tv or radio. then tv woke up to the beatles in '63 and all those screaming girls. >> we're coming up on the 50th anniversary on what happened in february of '64. what was the moment in '63. beatles in '62 had a couple of lovely songs. in '63 they were hammering out "i want to hold your hand." what was the tv moment. >> it was an airport moment when ed sullivan was coming back from london and beatles were coming home from stock home and he saw 2,000 or 3,000 screaming girls. >> that was happening in britain. >> been this huge shift in britain in '63. then ed sullivan wants these kids on his show. they go from february '63 their first hit to february '64, 73 million americans tune in to see them. >> '63 obviously an event we're coming up on the 50th anniversary, jfk's assassination.